<!DOCTYPE html>
<html style="direction: rtl; -moz-column-width: 1px;"><head><script>

function boom()
{
  document.documentElement.offsetHeight;
  document.body.style.unicodeBidi = "bidi-override";
  document.documentElement.offsetHeight;
}

</script></head><body style="white-space: pre;" onload="boom();">
H


</body></html>
